[AstroPy] Conversion between physical and world coordinate systems

Aaron Steffen steffen at astro.psu.edu
Mon Apr 17 09:17:47 CDT 2006


Hello everyone,

Does anyone know if there exists Python code that does coordinate  
transformations for image files opened in pyfits?  I know that  
pydrizzle.wcsutil.rd2xy (and xy2rd) converts between these two  
systems, but it only accepts single (ra, dec) tuple and does not  
handle array input or output.  Also, I am *assuming* that it opens  
the file to read in the header information each time it is called,  
and I am looking for a function that will take a header that you have  
already read in and will use it to do the coordinate transformation  
(thus minimizing disk access).

Thanks,
Aaron


------------------------------
Aaron Steffen
Department of Astronomy and Astrophysics
The Pennsylvania State University
Office: 814-863-6841
Fax: 814-863-3399
------------------------------



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